Arbitrary Angle Waveguide Bends Made of a New Heterostructure Phononic Crystal

Subject Areas : Mechanics of Solids

M Bagherinouri ¹ (Faculty of Engineering, Arak University, Arak, Iran)
M Moradi ² (Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran)

Received: 2023-03-20 Accepted : 2023-05-10 Published : 2023-06-01

Keywords: Heterostructure, Arbitrary angle waveguide bends, Phononic crystal,

Abstract :

In this paper, an arbitrary angle waveguide bend made of a new heterostructure phononic crystal has been studied. By creation of line defects in the proposed heterostructure which is composed of square and rhombus phononic crystals, a simple structure waveguide bend with arbitrary angles is made. Analyzing the proposed bend showed that by creating line defects in the composition of the square and equilateral triangle lattices, 30˚ waveguide bend can be realized. Also the study showed that by creating line defects in the composition of the square and rhombus lattices, 40˚ (20˚) waveguide bend could be obtained if the angular constant of the rhombus lattice is 80˚ (40˚). The 40˚ and 20˚ waveguide bends have a narrow pass band which can be utilized as a filter to separate a specific frequency and guide it along a defined pass. Also the study shows that by incorporation of 90˚ bend within the presented heterostructure bends, waveguide bends can be realized that guide elastic waves in the arbitrary angles greater than 90˚.

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